Method of repairing a manhole and pipes

ABSTRACT

A method of repairing a manhole is provided. A mastic material capable of curing and hardening as applied to a lower portion of the manhole, including the barrel, bench, and into at least one pipe line extending from the manhole. A resin saturated liner may also be included into a portion of the pipe extending from the manhole. A manhole liner saturated with a resinous material is then positioned in the manhole, and the manhole liner, pipe liner, and mastic material are configured to cure at approximately the same time to form a homogenous, repaired interior of the manhole, including a portion extending into the pipe. The pipe or pipes can then be repaired in a manner such as inverting a liner or bladder into the pipe. In the addition of an end seal at the juncture between the pipe and manhole is also contemplated for further sealing the juncture.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.14/287,360 filed May 27, 2014, the complete disclosure of which isincorporated by reference.

FIELD OF THE INVENTION

The present invention relates generally to the repair of manholes. Moreparticularly, but not exclusively, the invention relates to a method ofrepairing approximately the full interior of a manhole, including aportion of any pipe extending through or away from a manhole, to form amonolithic cured-in-place manhole liner.

BACKGROUND OF THE INVENTION

Conventional manholes include a lower or bottom pad, which may also beknown as a bench, a barrel having a relatively constant diameteradjacent to and extending generally upward from the pad, a concentric oreccentric cone extending upwardly from the barrel, one or more adjustingrings to adjust the overall height of the manhole, and a casting frameon top of the adjusting rings to support a lid at an elevationsubstantially level with the surrounding pavement. The cone may also beknown as a corbel, and the adjusting ring area may be referred to as achimney. The casting frame is preferably sealed to the uppermostadjusting ring to preclude or minimize water flow into the manhole.Furthermore, one or more pipes may extend from the manhole. For example,a pipe may extend through a portion of the bench at a pipe invert, withthe pipe continuing to extend from the pipe invert away from themanhole. In addition, other pipes may extend from any of the otherportions of the manhole.

One problem with existing manholes is that many were made long ago, andoftentimes, were made of brick. Due to the old age of the manholes, aswell as the materials used to make them, many manholes have begun todeteriorate or have damaged areas. The damaged areas create weak spots,which may allow water to infiltrate the sewer system and also lead tothe eventual collapse of the manhole.

Methods exist for repairing the walls of manholes. One such methodinvolves the use of a liner and a bladder to repair the manhole wall.The liner and bladder are placed in the manhole, and the bladder isexpanded to press the liner against the manhole wall. The liner isimpregnated with a resin and pressed against the manhole wall. Anothermethod includes trawling, slinging, spraying, or otherwise applying aresinous or grout material to the manhole wall along either the fullheight of the manhole or along a damaged portion of the manhole. A linerand/or bladder is then positioned in the manhole and expanded againstthe material until the material cures.

However, in both of these instances, only the portions of the manholealong the height of the manhole are repaired. The bench is generally notrepaired, and the juncture between any pipe extending through or fromthe manhole is also not repaired. These structures must be repairedseparately, which increases the time of repair, as well as thedifficulty in making the repairs. For example, each repair must wait forthe curable material to cure and harden before repairing the nextportion, which can greatly add to the total repair time. Furthermore,cured portions of the manhole repair may make it more difficult torepair subsequent portions of the manhole, which can also increase thetime and cost for manhole repair. This also becomes an issue when one ormore of the pipes extending through and/or from the manhole needrepaired, as this creates additional time and resources.

Therefore, there is a need in the art for a method of repairing amanhole and pipes extending through and/or from the manhole thatproduces a generally monolithic repair interior covering most or all ofthe interior of the manhole, as well as at least a portion of theinterior of any pipe. The method will allow the pipes to then berepaired from the repaired manhole with greater ease.

SUMMARY OF THE INVENTION

It is therefore a primary object, feature, and/or advantage of thepresent invention to overcome deficiencies in the art.

It is another object, feature, and/or advantage of the present inventionto provide a method of repairing a manhole

It is a further object, feature, and/or advantage of the presentinvention to repair the interior of a manhole with a monolithic,cured-in-place liner.

It is yet another object, feature, and/or advantage of the presentinvention to provide a method of repairing a manhole and pipes extendingthrough and from the manhole.

It is still another object, feature, and/or advantage of the presentinvention to provide a homogenous, single unit cured-in-place manholeliner.

It is a yet a further object, feature, and/or advantage of the presentinvention to repair pipe lines extending from a manhole after themanhole has been repaired with a portion of the pipelines repaired atthe same time as the manhole.

These and/or other objects, features, and advantages of the presentinvention will be apparent to those skilled in the art. The presentinvention is not to be limited to or by these objects, features andadvantages. No single embodiment need provide each and every object,feature, or advantage.

According to an aspect of the invention, a method of repairing a manholehaving a bench, a barrel extending generally upward from the bench, achimney extending from the barrel, and at least one pipeline extendingfrom a portion of the manhole is provided. The method includes applyinga mastic material to at least a portion of the bench and barrel, and atleast partially into the at least one pipeline. A pipe liner impregnatedwith a material capable of curing and hardening is positioned at leastpartially into the at least one pipeline and into contact with a wall ofthe pipeline. A manhole liner impregnated with a material capable ofcuring and hardening is positioned in the manhole. The manhole liner ispressed against a wall of the manhole, the mastic material, and/or aportion of the pipe liner, and the mastic material, pipe liner, andmanhole liner are allowed to cure and harden.

The pipeline can then be repaired by positioning a main pipe linerimpregnated with a material capable of curing and hardening into thepipeline after the mastic material, pipe liner, and manhole liner havecured. An end seal can overlap the previously repaired portion of thepipeline extending from the manhole.

According to another aspect of the invention, a method of repairing amanhole having a bench, a barrel generally upward from the bench, achimney extending from the barrel, and a pipeline extending from aportion of the manhole and including a pipe invert in the bench isprovided. The method includes applying a mastic material capable ofcuring to the bench, barrel, pipe invert and at least partially into thepipeline, positioning a first pipe liner impregnated with a materialcapable of curing and hardening at least partially into the pipeline,pressing the pipe liner against a wall of the pipeline, positioning amanhole liner impregnated with a material capable of curing andhardening in the manhole, and pressing the manhole liner against a wallof the manhole.

According to yet another aspect of the invention, a method of repairinga manhole is provided. The method includes applying a mastic materialcapable of curing and hardening about a lower portion of the manhole andany pipes extending from the manhole, positioning a first pipe linerimpregnated with a material capable of curing and hardening at leastpartially into each pipe extending from the manhole, with the masticmaterial between the first liner and a wall of the pipes, positioning amanhole liner impregnated with a material capable of curing andhardening into the manhole, and pressing the first pipe liners andmanhole liner against the wall of the pipes and the manhole and allowingthe materials to cure and harden.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sectional view of a manhole with a pipeline in line with thepipeline.

FIG. 2 is a sectional view of a manhole in line with a pipeline showinga portion of the manhole repair.

FIG. 3 is a view similar to FIG. 2 showing a side view of the manholeand pipeline extending therethrough.

FIG. 4 is a side sectional view of the manhole and pipeline showingadditional repair of the structure.

FIG. 5 is a view similar to FIG. 4 showing additional repair of themanhole and pipeline.

FIG. 6 is a view of the manhole showing additional repair to thepipeline extending through and from the manhole.

FIG. 7 is a side sectional view of the repaired manhole and pipeline.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1 is a sectional view of a manhole 10 having a pipe line 26extending through and from the manhole 10. A manhole 10, such as shownin FIG. 1, generally comprises either brick or concrete structures. Thepresent invention is a method and means of repairing a manhole 10,including both brick and concrete manholes. While the general componentsof a manhole are the same, there are a few differences between theconcrete and brick manholes. For example, as shown in the figures, theexemplary manhole 10 of the figures includes a base 11. A bench 12 ispositioned generally at the base 11 and includes gently sloping surfacestowards a pipe invert 14 in the base 11. The pipe invert 14 is alignedwith the pipe 26 to allow materials flowing through the pipe 26 to passthrough the manhole base 11. Extending generally upward from the base 11is a barrel 16 comprising the manhole wall.

Extending from the barrel 16 is a cone or corbel 18. As mentioned, manyof the components are similar between concrete and brick manholes.However, in concrete manhole structures, the section is generallyreferred to a cone 18. In brick manholes, the structure is generallyreferred to as a corbel 18. However, for purposes of the presentinvention, the terms cone and corbel are to be used interchangeably todefine the portion of the manhole referred to by the numeral 18.Furthermore, the cone 18 may be concentric, as shown through thefigures, or maybe eccentric, such that the shape of the manhole may varyat one side or one portion compared to the other.

Extending generally upward from the cone or corbel 18 is a riser orchimney 20. Similar to the section referred to by the numeral 18,concrete manholes at this region may be known as a riser 20, while brickmanholes at this section may be known as a chimney 20. However, it is tobe understood that the terms riser and chimney may be usedinterchangeably throughout the present invention to refer to the sectiongenerally shown by the number 20 in the figures. In addition, the regionshown by the number 20 may include adjusting rings to vary the height ofthe manhole 10.

Positioned generally at an upper end of the chimney 20 is a castingframe 22 for housing a cover 24. Furthermore, as shown in FIG. 1, thepipe 26 will include a pipe junction 28 at the position between theopening of the pipe 26 and the wall of the manhole 10, for instance atthe barrel 16 of the manhole 10. While the manhole 10 shown throughoutthe figures includes a pipe extending from opposite directions of themanhole wall and extending through the bench 12 and base 11 of the lowerportion of the manhole 10, it is to be understood that the manhole 10may include any number of pipe lines 26 extending through or from themanhole at any orientation therefrom. For example, the pipes may extendat 90° angles from the barrel, which may be referred to as tee shapedpipes, or may be at obtuse angles to the barrel (wye angled pipes). Forpurposes of the embodiments of the invention, the figures show anexemplary embodiment of a manhole that is repaired with the presentinvention and that includes a pipe extending at approximately a 90° fromthe manhole and extending through the manhole.

FIGS. 2 and 3 show the application of a mastic material 32 to a lowerportion of the manhole 10. The mastic material 32, which may be asealant or epoxy resin, can be applied by trawling, dispensing,painting, slinging, or otherwise applying the material 32 to theportions of the manhole 10, including into a portion of the pipe 26. Themastic material 32 is applied by buttering up the entire opening of thepipe inlet and outlet, covering the bench 12 of the manhole 10, andfurther applying the material to a portion of the barrel 16. Forexample, the mastic material 32 may be applied approximately a foot intoeach pipe extending from the manhole 10, as well as a foot up themanhole barrel 16, while covering the bench 12. However, the exactdistance and/or amount for applying the mastic material 32 about theinterior of the manhole 10 and/or pipes 26 is not to be exclusive, andgenerally any amount of mastic material in any distance and directioninto the manhole 10 and/or pipe 26 may be included as part of theinvention.

The mastic material 32 can be selected such that it has a pot timesufficient to repair additional elements of the manhole 10 and/or pipes26 before the material cures. In addition, the mastic material 32 shouldcomprise a sealant such that it is able to aid in repairing and sealingthe juncture 28 between the pipe 26 and the manhole 10. The applicationof the mastic material 32 to the bench 12, barrel 16, invert 14, pipechannel 30, and pipe 26 will provide a rehabilitated floor for theinterior of the manhole 10 that extends into each pipe, at approximatelyone to two feet into each pipe.

After the mastic material 32 has been applied to the lower portion ofthe manhole 10 and at least partially into the interior of the pipes 26extending through and from the manhole, a first section of pipe liner 34is positioned at least partially into each section of pipe 26 extendingfrom the manhole 10. The first pipe liner 34 extends at least partiallyinto interior of the manhole 10, and is positioned adjacent the masticmaterial 32 at the pipe juncture 28 and in the pipe 26. The pipe liner34 may comprise a resin impregnable material such as felt or the like.Once the liners 34 have been saturated with the resinous materialcapable of curing and hardening, the one or more liners 34 arepositioned to extend at least partially within to the pipes 26. Theliners 34, which comprise tube shaped members, are then pressed againstthe mastic material 32 and/or the pipeline walls. A bladder or plug 36may be used to press the liners 34 into contact with the mastic materialand/or walls of the pipe 26. As shown in FIG. 4, the use of plugs isshown. The plug 36 is positioned generally within the pipe liner tube 34(the lumen of the tube) and air or another fluid is provided to the plug36 via tubes 37 to inflate and expand the plug into contact with thepipe liner 34, which presses the pipe liner into contact with the masticmaterial 32 and/or wall of the pipe line 26. It should be appreciatedthat the resin used with the liners 34 should have a pot time such thatit does not cure before the curing of the mastic material 32 applied tothe interior of the manhole and pipe.

FIG. 5 shows the positioning of a manhole liner 38 and manhole bladder40 within the manhole 10 to further repair the interior of the manhole10 and pipe 26. The manhole liner 38 comprises a material capable ofbeing impregnated with a resinous material capable of curing andhardening, such as felt or the like. The bladder 40 is an inflatablemember positioned generally within the manhole liner 38, and the bladder40 is filled with a fluid, such as air or steam, to expand the bladderoutward to press the manhole liner into contact with the walls of themanhole 10 and/or a portion of the mastic material 32. As mentioned, themanhole liner 38 is impregnated with a resinous material capable ofcuring and hardening.

The resinous materials of the manhole liner 38 and pipe liner 34, aswell as the mastic material 32 are then allowed to cure after theelements have been positioned within the manhole 10 and/or pipe 26.Thus, while the manhole bladder 40 is inserted into the manhole 10, theplugs 36 or other pipe bladder may be inserted into the pipe line 26 topress the pipe liner against the wall and/or mastic material 32. Thepressure is maintained until the resinous materials of the liners 34,38, as well as the mastic material 32, has cured and hardened. The pipeliners 34, the mastic material 32, and the resin saturated manhole linertube 38 all cure as a single unit and form a monolithic, cured in placedmanhole liner that extends at least a portion into each pipe extendingfrom the manhole 10. For example, it is contemplated that the pipeliners 34 may extend into the pipe approximately one or two feet. Havingthe elements cure at approximately the same time provides for a somewhatuniform interior for the manhole 10 and at least a portion of the pipe26.

In addition, it should be appreciated that not all the elements berequired to provide a substantially uniform, rehabilitated interior ofthe manhole and/or pipes. For example, the first pipe liners 34 may notbe required in all embodiments of the present invention, and it may justbe the application of the mastic material 32 at a lower end of themanhole 10 and into at least a portion of the pipe liners 26, as well asthe use of the resin saturated manhole liner 38 to repair the interiorof the manhole. This will still provide a single unit cured in placemanhole liner extending into a portion of the pipes, which includes thesealant at the pipe juncture 28 between the pipe line 26 and the manhole10. In addition, the present invention contemplates the use of a flangedmanhole liner 38, which extends at least partially into a portion of thepipe liner 26 at the pipe juncture 28 to provide for a rehabilitatedmanhole 10 having a portion extending into the pipe line 26. However,the mastic material and/or resin absorbent liners cure at approximatelythe same time so as to form a homogenous, single unit cured in placemanhole liner. This is advantageous over previous methods of repairing amanhole.

Furthermore, FIGS. 6 and 7 show additional repairs to the pipe line 26extending through and from the manhole 10, which may be repaired afterthe homogenous and/or monolithic cured in place manhole liner extendinginto the pipe 26 has cured and hardened. As mentioned, the repairs shownin FIGS. 1-5 will provide a rehabilitated interior of the manhole 10,which includes a portion extending into at least one pipe extendingthrough or from the manhole 10. However, the pipes extending through andfrom the manhole 10 may also need to be rehabilitated as well. FIGS. 6and 7 show a method of repairing such pipes after the manhole 10 hasbeen rehabilitated.

After the manhole repair elements have cured and hardened, a main pipeliner 42 may be extended into one or more of the pipes 26 in anydirection that they may extend from the manhole 10. The main pipe liner42 comprises a resin impregnable material, such as felt or the like,that is saturated with a resinous material capable of curing andhardening. A main pipe bladder 44 may also be included to expand withinthe main pipe liner 42 to press the pipe liner 42 against the walls ofthe pipe 26, during which time the materials saturated within the liner42 can cure and harden. FIG. 6 shows the pipe liner 42 and pipe bladder44 inverted into the pipe 26 in both directions, for purposes of theinvention referred to as right and left with respect to FIGS. 6 and 7.The use of inverting a liner and bladder 42, 44 into a pipe, such aspipe 26, is known in the art and is generally described in U.S. Pat. No.8,567,451, which is hereby incorporated in its entirety. In addition,the liner and bladder 42, 44 may be pulled in place into the pipe 26,which is also known in the art.

Furthermore, the repair of the pipe 26 in both the right and leftdirections shown in FIGS. 6 and 7 may include the use of end seals 46,52. The end seals, and their use, are described in U.S. Pat. No.8,240,340, which is hereby incorporated in its entirety. As shown inFIGS. 6 and 7, the pipe repair extending to the right of the manhole 10includes the use of an end seal 46 having a tube portion 48 and a flangesection 50 extending generally from one of the ends of the tube section.The flange 50 allows the end seal to be positioned about the juncture 28of the manhole 10 and pipe 26 to provide additional sealing at saidjuncture. The end seal, as is described in the '340 patent, may comprisea hydrophilic material, or an absorbable material saturated with ahydrophilic material. Furthermore, the end seal may be compressible. Asis known, the hydrophilic characteristics of the end seal will provideswelling when in contact with a liquid, such as water, to further aid insealing the junction 28 of the pipe 26 and manhole 10.

The pipe repair extending to the left of the manhole 10 shown in FIGS. 6and 7 includes an end seal 52 comprising only a tube portion 54. The endseal 52 will be positioned generally at or near the juncture of themanhole 10 and the pipe 26 to provide sealing thereof. In addition, theend seal 52 may be supported by a retaining ring 56. A retaining ring 56and use thereof is shown and described in U.S. Pat. No. 8,240,341, whichis hereby incorporated in its entirety. While either of the end seals46, 52 may be self-supporting, the use of the retaining ring 56 may aidin the supporting of the end seal such that the end seal will notcollapse prior to the curing and hardening of the pipe liner 42positioned in the lumen of the end seal. In addition, the retaining ring56 may be used with either or both types of end seals, tube or tube andflange.

The bladder 44 presses the liners 42 against the wall of the pipe 26,end seal, mastic material 32, and/or first pipe liner 34, and maintainsits positioning against said element(s) until the resinous material hascured and hardened. The resinous material that is saturated into thepipe liner 42 may be a time curing material such that the passage oftime will allow the materials to cure, or maybe of such a compositionwhereas the curing time can be reduced. For example, a thermoset orphoto curing resin can be used and is contemplated by the presentinvention whereas the introduction of heat or light speeds up the curingtime for the material. Other types of materials, including epoxies,resins, and grouts, are intended to be included as part of the presentinvention. Once the material has hardened, the bladders are removed, anda repaired manhole and pipes extending therefrom remains.

Thus, the present invention provides the advantages of reducing theamount of time to repair the interior of the manhole and any pipesextending through and from said manhole. This is done by including therepair of, or at least part of, one or more pipes extending from themanhole during repair of said manhole. Such repair, including theaddition of mastic material and/or liner material at the junctionbetween the manhole and the pipe will further aid in sealing saidjuncture, which is an area known to be weak and/or leaky for existingmanhole/pipe connections.

It is further contemplated that any combination or sub-combination ofthe elements shown and described hereto for may be incorporated into anembodiment for repair of the manhole and/or pipes extending therefrom.Any of the elements may be omitted, while still providing for the repairof the manhole and pipe. For example, it is contemplated that not allembodiments require the use of an end seal when repairing a pipeextending from the manhole. As mentioned, the present invention alsocontemplates the omission of the first pipe liner 34. For example, oneembodiment of the present invention contemplates the mastic material beapplied at a lower portion of the manhole including the bottom floor ofthe manhole and into a portion of a pipe or pipes extending therefrom.The manhole liner can then be positioned and cured in the manhole withthe curing of the manhole liner and the mastic material occurring atapproximately the same time. Next, a pipe extending from the manhole canbe repaired in the manner shown and described, with the omission of thecomponents of the first liner and end seal. However, the end seal couldalso be used with said embodiment. Therefore, as mentions, the presentinvention contemplates the use of any combination of said components,including the omission of components. However, it is to be appreciatedthat the methods shown and described will be provide for rehabilitationof the interior of a manhole and at least a portion of pipes extendingfrom said manhole to form a monolithic or homogenous cured in placeinterior for the manhole. This will provide for easier repair of thepipes extending from the manhole.

It should be understood that additional changes and modifications to theembodiments shown and described herein will be apparent to those skilledin the art. Such changes and modifications may be made without departedfrom the spirit and scope of the invention, and without diminishing itsadvantages. It is intended, therefore, that such changes andmodifications be covered by the embodiments of the invention.

The invention claimed is:
 1. A method of repairing a manhole having atleast one pipeline extending from a portion of the manhole, the methodcomprising: applying a mastic material to a lower portion of the manholeand at least partially into the at least one pipeline; positioning amanhole liner impregnated with a material capable of curing andhardening in the manhole; pressing the manhole liner against a wall ofthe manhole and the mastic material; and allowing the mastic materialand manhole liner to cure and harden forming a single monolithic curedin place liner extending from the lower portion of the manhole into theat least one pipeline.
 2. The method of claim 1 further comprisingrepairing the at least one pipeline by positioning a main pipe linerimpregnated with a material capable of curing and hardening into thepipeline after the mastic material and manhole liner have cured.
 3. Themethod of claim 2 wherein the main pipe liner is positioned in the atleast one pipeline by inversion.
 4. The method of claim 2 wherein themastic material is applied by one of trawling, dispensing, painting, andslinging.
 5. The method of claim 2 further comprising positioning an endseal between the main pipe liner and the wall of the manhole.
 6. Themethod of claim 5 wherein the end seal comprises a tube and a flangeextending about an end of the tube, wherein the flange is positioned atleast partially in the manhole.
 7. The method of claim 5 furthercomprising positioning a retaining ring between the end seal and themain pipe liner.
 8. The method of claim 1 further comprising positioninga manhole bladder at least partially within the manhole liner andinflating the bladder to press the manhole liner against the wall of themanhole.
 9. The method of claim 8 further comprising positioning a pipebladder at least partially into the at least one pipeline to press themain pipe liner into contact with a wall of the pipeline.
 10. The methodof claim 9 wherein the manhole bladder and pipe bladder are removedafter the materials have cured and hardened.
 11. The method of claim 1wherein the mastic material and materials impregnated into the manholeliner cure and harden at approximately the same time.
 12. The method ofclaim 1 wherein the manhole includes multiple pipes extending from aportion of the manhole, and further comprising applying the masticmaterial into each of the pipes.
 13. A method of repairing a manhole anda pipeline extending from a portion of the manhole, the methodcomprising: applying a mastic material capable of curing to a wall ofthe manhole and at least partially into the pipeline; positioning amanhole liner impregnated with a material capable of curing andhardening in the manhole, wherein the manhole liner includes a flangedportion which extends into a portion of the pipeline; and pressing themanhole liner against the wall of the manhole; allowing the masticmaterial and manhole liner to cure and harden forming a singlemonolithic cured in place liner wherein the flanged portion of themanhole liner extends from the manhole into the pipeline.
 14. The methodof claim 13 wherein the mastic material is applied by one of trawling,dispensing, painting, and slinging.
 15. The method of claim 13 furthercomprising repairing the pipeline by positioning a main pipe linerimpregnated with a material capable of curing and hardening into thepipeline after allowing the manhole liner material to cure.
 16. Themethod of claim 15 wherein the main pipe liner is positioned in the atleast one pipeline by inversion.
 17. The method of claim 15 furthercomprising positioning an end seal between the main pipe liner and thewall of the manhole.
 18. The method of claim 13 further comprisingpositioning a manhole bladder at least partially within the manholeliner and inflating the bladder to press the manhole liner against thewall of the manhole.
 19. The method of claim 18 wherein the manholebladder is removed after the materials have cured and hardened.
 20. Amethod of repairing a manhole, comprising: applying a mastic materialcapable of curing and hardening about a lower portion of the manhole andany pipes extending from the manhole; positioning a first pipe linerimpregnated with a material capable of curing and hardening at leastpartially into each pipe extending from the manhole, with the masticmaterial between the first liner and a wall of the pipes; positioning amanhole liner impregnated with a material capable of curing andhardening into the manhole, with the mastic material between a lowerportion of the manhole liner and the lower portion of the manhole; andpressing the first pipe liners and manhole liner against the wall of thepipes and the manhole and allowing the materials to cure and hardenforming a single monolithic cured in place liner.
 21. The method ofclaim 20 further comprising repairing each of the pipes extending fromthe manhole by positioning main pipe liners against the walls of thepipes a distance further than the first pipe liners.
 22. The method ofclaim 20 further comprising positioning a manhole bladder at leastpartially within the manhole liner, and expanding the manhole bladder topress the manhole liner against the wall of the manhole.
 23. The methodof claim 20 wherein the mastic material and materials impregnated intothe manhole liner and the first liners are configured to cure atapproximately the same time to form a monolithic repaired interior ofthe manhole.